Simulysis Blog

Engineering challenge:

Optimization of the inflow through intake ports is very important factor of development of an internal combustion engines. So that the charge movement generated by the intake flow considerably influence the volumetric efficient of the diesel engine. Swirl and tumble motion during the intake stroke determine the nature of the swirling flow in an engine, so CFD simulations and steady state flow tests are often used to characterize the swirl and discharge coefficient. This will helps to optimize the geometrical shape of the intake port or valve that produces the optimum efficiency. One of the  the best way to analyse the intake port is to simulate the actual flow condition in the computational flow dynamics . By this way, the simulation provides the fluid velocity and pressure throughout the solution domain with complex geometries and boundary conditions. 

Design optimization of intake port in diesel engine is to be done by using computation fluid dynamics (CFD) analysis. The aim of the task is to achieve optimum mass flow rate inside the combustion chamber that is expected to increase the volumetric efficiency of the diesel engine.  The anlysis was carried out at different valve lifts with increased valve seat diameter to obtain maximum air flow rate, mass flow as well as the discharge coefficients. The required fluid domain was modeled and meshed (Pre-Processing). The mesh file is then imported to a solver and different material property required for solving has to be specified. The necessary boundary conditions should also be given. The solving is then carried out and different results are then viewed in a Post-Processor. 


Velocity magnitude streamlines

2 mm Lift

 5 mm Lift

8 mm Lift
Back to top